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Ms Margaret Lagorio <br /> Page 3 of 3 <br /> • Dissolved benzene concentrations in wells MW1 and MW3 increased slightly from November <br /> g Y <br /> 2001 levels, but remain only marginally above the Maximum Contaminant Level (MCL) of 1 0 <br /> ppb ` <br /> RECOMMENDATIONS <br /> Ground Zero makes the following recommendations <br /> 1 Continue quarterly groundwater monitoring and sampling at the site through the end of 2002 <br /> to confirm contaminant concentrations and evaluate the stability of dissolved gasoline constituents <br /> beneath the site, <br /> 2 Based upon analytical results conducted to date, discontinue analysis of groundwater samples for <br /> the presence of TPHk, TPHd, oxygenated gasoline additives, EDB, and 1,2-DCA <br /> We are currently conducting a sensitive receptor survey within 2000 feet of the subject site as directed <br /> by EHD The results of the survey will be subautted under separate cover Please contact Ground <br /> Zero at(209) 838-9888 if you have any questions regarding this submittal <br /> Respectfully, <br /> Ground Zero Analysis, Inc � o <br /> JOHN P <br /> Sean Garvey LWE- <br /> Staff Geologist cn� No 6795 4 <br /> John P Lane C <br /> CA Registered Geologist No 6795 <br /> Attachments <br /> cc Ms Karen Collins, Environmental Closures <br /> Mr Marty Hartzell, RWQCB <br /> Mr Pat Riddle, Esq <br /> Mr Mike Souza, Souza II, LLC <br /> • <br /> G\Data1GROUNDZE\Souza\Reportsl2QMR_2002 doc <br />